Receiving apparatus for wireless telegraphy.



R. R. GOLDTHORP. RECEIVING APPARATUS FOR WIRELESS TELEGRAPHY.

APPLICATION FILED OUT. 29, 1909.

Patented May 31, 1910.

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RECEIVING APPARATUS FOR WIRELESS TBLEGRAPHY.

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Patented May 31, 1910.

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ROBERT E. GOLDTHORTK OF HARTFORD, CONNECTICUT.

RECEIVING APPARATUS FOR WIRELESS TELEGRAPHY.

Specification o1 Letterslatent.

Patented May 31, 1910.

Application filed October 29, 1909. Serial- No. 525,254.

To all whom it may concern: 7

Be it known that I, ROBERT R. Gonn- THORP, a citizen of the United States, and a resident of Hartford, in the county of-Harflford and State of Connecticut, have in vented certain new and useful Improvements in ReceivingApparatusfor Wireless Telegraphy, of which the following is a specification.

The object of my invention is to provide a set of receiving instruments for use in wireless telegraphy which is simple, compact and self-contained and all parts of which are readily accessible.

My invention is illustrated in the draw- Figure l is a side view of the apparatus with some parts in central vertical section. Fig. 2 is an end view at the right hand end of Fig. 1. Fig. 3 is a transverse section on the lines 3-3 of Fig. 1. Fig. 4 is a View of the inner side of the hinged mounting plate. Fig. 5 is a top view showing the mounting plate open. Fig. 6 shows diagrammatically one way of connecting't-he parts of the ap- Fig. 7 shows diagrammatically another Way of connecting the parts of the ap 'aratus.

s is well known the essential parts ofathe receiving apparatus for wireless 'telegraphy comprise a tunin coil, 'a condenser, an adjusting and regu atingdevice for the condenser," a detector and a telephone "receiver. Heretofore these various elements have been built up as independent structures and grouped together where they will be easily accessible; such apparatus is well designed for the larger commercial stations. The use of wireless telegraphy has grown very rapidly of late creating demands for a small compact and portable set .of receiving instruments and by the herein described invention such a compact and readily portable set of receiving instruments is provided.

Referrin to ,the drawings a denotes the tuning coil, which, so far as'its functions are concerned, may be of any well known type in the 01311 of a hollow cylindrical shell 0/ attached at the front end to the shell and at the rear end connected to ground, a

double binding post 9 being provided for this purpose. Slide-rods a extend lengthwise of the core and carry slides a which contact with the wire of the coil. At'the" .The tuning coil ill11strated is wound with a single layer of wire front end of the tuning coil these slide-rodsare connected with the aerial wire. Fitting closely in the rear end of the shell is the condenser supporting plate 6 carrying the condenser 0, the inner end of which may be supported by a partitionp, which as shown is arranged transversely of the shell. To the opposite (front) end of the shell is fitted a mounting plate m supported on hinges h h sothat it can be opened to permit access to' the parts mounted on it. On this mount-ing plate is a condenser regulator r and a detector d. The regulator comprises a handle in the form of a thumb nut n rotatably mounted in the supporting plate and connected with arms n on the inner side of said plate, the ends of which overlie and are adapted to Contact with terminals 1, 2, 3, connected with the condenser so that any inner side of the supportin plate with a binding post t on the outsi' e of the plate.

,This detector may be of any type desired.

The electrical connection between the de tector and the rod 2130f the tuning coil is made through the hinges h h. and strips of conducting material it h, as clearly indi cated in Fig. 4.

A contact pin e is connected with the detector on the inside of the mounting plate mat a point where it will underlie and contact with one of the arms n of, the condenser regulatorm when it is in its ofi position. The condenser regulator is electrically connected with the detector as by the conductor number of sections of the condenser can be utilized." The detector is mounted on the d and it will be seen that when the regulator is moved to its off position the'detector is short circuited.

The telephone receiver may be connected in one of two circuits. In one case the circuit extends between the detector binding post t and the double binding post 9 which connects the receiver around the'condenser,

as illustrated diatigtmmatically in Fig. 6.

vIt is to be un erstood that my herein de-- scribed-invention may be utilized in connection with other styles of apparatus; for in-v stance, the loose coupled system, the balanced tuning system, etc. a

1. A receiving apparatus for wireless tocoil and

a hollow tunin 'legraphy com risin iocate within said 001 a condenser supported from one end thereof, a condenser regulator: mounted at the opposite end of said coil, electrical connections between said condenser and said regulator, and a detector mounted within said coil, substantially as described.

2. A receiving apparatus for'wireless telegraphy comprlsing a hollow tuning coil, a condenser located within said coil and supported from one end thereof, a condenser regulator mounted at the opposite end of said coil, electrical connections betwen said condenser and said regulator, a detector mounted within said coil adjacent to said re lator, electrical connections between sa1d detector and said regulator, a contact pin located in the circuit of said detector and ada ted to make electrical *connections with sai regulator when the latter; is in its ofi position to short circuit said detector,

I 3. A receiving le'graphy comprising a hollow tuning coil, a condenser located within said coil and supported -from one end thereof, amounting plate hingedto the opposite end of said coil and adapted to close the o ening therein, a

connections between said con enser and said ator, a detector secured to the mslde of.

condenser re ulator rotata 1y mounted on the outside-o said mounting late, electrical re said mounting plate and connected with the bindin post on the outside thereof, substantia y-as described.

4. A receiving apparatus for wireless telegraphv com rlsing a hollow tuning coil, a

sectional con enser located within said coil apparatus for wireless teooamo v denser and said terminals, a regulator rotatably mounted on said mounting plate and havang fingers adapted to be moved into operative relation'with said terminals, a detector secured to'said mounting plate, electrical connections between said tuning coil and said detector, electrical connections be-' tween said detector and said regulator, a

into the circuit of said detector and adapted to be engaged by oneof the'fingers of said regulator when in its off position. 5. A receiving apparatus for wireless telegraphy com rising a hollow tuning coil, a sectional cond zenser located 'within said coil and supported from one end thereof, a mounting plate hinged to the opposite end of said coil and closing the openm'g therein a detector mounted on the inside of sai mountin plate, electrical connections from said coi to said detector through said hinges, condenser terminals on saidggmounting late corresponding in ,number'f'to .the num r of sections of said cond electrical connections between each of said condenser and one oi said terminals, a regulator rotatably mounted in said mounting plate and having a plurality of fingers corresponding in number to the number of condenser terminals and adapted to cooperate therewith for the purpose of determining the number of condenser sections in circuit, electrical connections between said detector and said regulator, a terminal in said detector circuit adapted to be engaged by one of the fingers of said regulator when in its oif position, substantially as described.

RFD-BERT R. GOLDTHORP.

terminal in said mounting plate connected 

